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20120928
20121006
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Search Results 0 to 8 of about 9 (some duplicates have been removed)
PBS
Oct 3, 2012 12:00am PDT
is in decline. researchers at the australian institute of marine science say the reef has lost half of its coral cover over the past 27 years. there are multiple causes, including a destructive kind of starfish shown here. we look at what's behind it and what's at stake-- in australia and around the world-- with nancy knowlton, a coral reef biologist and a chair of marine science at the smithsonian national museum of natural history here in washington. welcome. >> thanks. how has all of this coral died off? do we know what's causing it? is it all that... >> it's not all the star fish. the star fish is about 42%. typhoons, big strong storms another 48% and then coral bleaching is the remaining 10% which is caused whenever the water gets too hot. >> ifill: so this is human causedded? >> yes. most of it is human caused. i mean a coral reef naturally goes through cycles of up and down. but it shouldn't be declining by half over course of 27 years. >> ifill: i feel like we have talked before about the declining coral cover. but not... but i'm wondering whether it's now picking up speed or whether thi
CNN
Oct 3, 2012 2:00am PDT
isn't rocket science. it's just common sense. from td ameritrade. >>> we've heard it all morning long it and still makes us jump. a huge 747 crashing in the dessert, by remote control, all part of the discover channel's new "curiosity" series where a controlled experiment was captured by 40 cameras and sensors to give researchers what happens during a crash atlantaing. >> it airs on discovery channel this sunday night at 9 p.m. two top experts are here with us now, accident investigator dr. tom barth and dr. cindy bir. >> thank you for being with us this morning. we're very excited about this. >> i asked you, dr. bir, earlier, have you ever attempted to do this before and you said you have. this took over four years to plan. why did you want to crash a plane? >> we were -- i was approached by a production company to do this about four years ago. i think tom and i were approached about the same sometime. and was just such an interesting project. i didn't attempt it before, but it was attempted back in '84. and they had lessons learned. we have new technology. so, it was a wonderful opp
Search Results 0 to 8 of about 9 (some duplicates have been removed)